Hydrogen-Bonded Thermostable Liquid Crystalline Complex Formed by Biodegradable Polymer and Amphiphilic Molecules
Hydrogen-Bonded Thermostable Liquid Crystalline Complex Formed by Biodegradable Polymer and Amphiphilic Molecules
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DOI：
10.1021/ma7020562
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发表时间：
2008-04
期刊：
影响因子：
5.5
通讯作者：
Tao Yu;Yongnian Zhou;Ying Zhao;Kaipeng Liu;E. Chen;Dujing Wang;Fo-song Wang
中科院分区：
文献类型：
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作者：
Tao Yu;Yongnian Zhou;Ying Zhao;Kaipeng Liu;E. Chen;Dujing Wang;Fo-song Wang
我们报道了一种简单的方法，通过溶液混合聚（碳酸亚丙酯）（PPC）和十八烷酸（OA）来制备可生物降解的聚合物-两亲物复合物。通过热重分析（TGA）、差示扫描量热分析（DSC）、广角X射线衍射（WAXD）、小角X射线散射（SAXS）、偏光显微镜（POM）、透射电子显微镜（TEM）和傅里叶变换红外光谱（FT-IR）等手段对配合物进行了表征。与无定形PPC共聚物相比，PPC−OA-x复合物显示出优异的热稳定性，并形成热致液晶态，而没有刚性介晶单元。提出了相应的机理来解释所观察到的现象。PPC和OA分子之间的氢键相互作用引起的稳定效应是导致热稳定性和液晶态形成的原因。本研究结果可扩大此类可生物降解脂肪族聚碳的应用范围。
We report a simple method to prepare biodegradable polymer−amphiphile complexes by solution mixing of poly(propylene carbonate) (PPC) with octadecanoic acid (OA). The complexes were characterized by combination of thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), polarizing optical microscopy (POM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). Compared with the amorphous PPC copolymer, the PPC−OA-x complexes show excellent thermal stability and form thermotropic liquid crystalline state without rigid mesogenic units. The corresponding mechanism has been proposed to elucidate the observed phenomena. The stabilization effect induced by hydrogen-bonding interactions between PPC and OA molecules is responsible for the thermostability and formation of liquid crystalline state. The present findings may extend the applications of such biodegradable aliphatic polycarbon...